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ESB-2012.0467 - [Win][UNIX/Linux] OpenSSL: Denial of service - Remote/unauthenticated

Date: 14 May 2012
References: ESB-2012.0479  ESB-2012.0502  ESB-2012.0726  ESB-2012.0732  ESB-2012.0912  ESB-2012.0927  ESB-2012.0930  ESB-2013.0078  ESB-2013.0300  ESB-2013.0443  


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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2012.0467
              Invalid TLS/DTLS record attack (CVE-2012-2333)
                                14 May 2012

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           OpenSSL
Publisher:         OpenSSL
Operating System:  UNIX variants (UNIX, Linux, OSX)
                   Windows
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2012-2333  

Original Bulletin: 
   http://www.openssl.org/news/secadv_20120510.txt

- --------------------------BEGIN INCLUDED TEXT--------------------

OpenSSL Security Advisory [10 May 2012]
=======================================

Invalid TLS/DTLS record attack (CVE-2012-2333)
===============================================

A flaw in the OpenSSL handling of CBC mode ciphersuites in TLS 1.1, 1.2 and
DTLS can be exploited in a denial of service attack on both clients and
servers.

DTLS applications are affected in all versions of OpenSSL. TLS is only
affected in OpenSSL 1.0.1 and later.

Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic fuzzing
as a service testing platform.

The fix was developed by Stephen Henson of the OpenSSL core team.

Affected users should upgrade to OpenSSL 1.0.1c, 1.0.0j or 0.9.8x

References
==========

URL for this Security Advisory:
http://www.openssl.org/news/secadv_20120510.txt

- --------------------------END INCLUDED TEXT--------------------

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
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===========================================================================
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